The fighter had a top speed of 400 km/h (250 mph) at 6,000 m (19,690 ft), which could be maintained for 20 minutes, while having a total flight duration of 90 minutes. The critical altitude of 6,000 metres could be reached in no more than 17 minutes, and the fighter had an operational ceiling of 10,000 metres. Power was to be provided was Junkers Jumo 210 engine of about 522 kW (700 hp). It was to be armed with either a single 20 mm MG C/30 engine-mounted cannon firing through the propeller hub as a Motorkanone, or two synchronized, engine cowl-mounted 7. 92 mm (. 312 in) MG 17 machine guns, or one lightweight engine-mounted 20 mm MG FF cannon with two 7. 92 mm MG 17s. The MG C/30 was an airborne adaption of the 2 cm FlaK 30 anti-aircraft gun, which fired very powerful "Long Solothurn" ammunition, but was very heavy and had a low fire rate. It was also specified that the wing loading should be kept below 100 kg/m2. The performance was to be evaluated based on the fighter's level speed, rate of climb, and maneuverability, in that order.